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Preparation method of carbon dot coated cerium dioxide material and application of material in fluorine ion adsorption and detection

A technology of ceria and carbon dots, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problem of limited effective adsorption, low content of active groups, poor dispersion, etc. problems, to achieve good water solubility

Pending Publication Date: 2021-12-07
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cerium, as an abundant and cheap rare earth element, has been reported in the literature that CeO 2 with excellent F - adsorption activity, but the CeO 2 The dispersibility in water is poor, and the content of active groups on its surface is less, which limits its ability to F - effective adsorption

Method used

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  • Preparation method of carbon dot coated cerium dioxide material and application of material in fluorine ion adsorption and detection
  • Preparation method of carbon dot coated cerium dioxide material and application of material in fluorine ion adsorption and detection
  • Preparation method of carbon dot coated cerium dioxide material and application of material in fluorine ion adsorption and detection

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Experimental program
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Effect test

Embodiment 1

[0032] Step 1: Dissolve 204 mg of tannic acid and 11.83 mg of anhydrous cerium chloride in 10 mL of deionized water. After ultrasonic dissolution, add 500 μL of ammonia water, 625 μL of hydrazine hydrate, and 3.875 mL of absolute ethanol to obtain a mixed solution.

[0033] Step 2: Add the solution mixed in step 1 into the liner of the polytetrafluoroethylene-lined hydrothermal reaction kettle, put it on the hydrothermal reaction kettle high-pressure tank, and put it in an oven at 180°C for 10 hours to react.

[0034] Step 3: After the reaction is completed, cool to room temperature, transfer the solution to a 50mL centrifuge tube, filter with a 0.22μM filter membrane, transfer the filtered solution to a 1000D dialysis bag, and transfer it to a tube filled with deionized water. Dialyze in a 2L beaker for 8 hours. After the dialysis, transfer the solution in the dialysis bag to a 50mL centrifuge tube, freeze it with liquid nitrogen, and then put it into a lyophilizer for freeze-...

Embodiment 2

[0050] Step 1: Dissolve 204 mg of tannic acid and 5.915 mg of anhydrous cerium chloride in 10 mL of deionized water. After ultrasonic dissolution, add 500 μL of ammonia water, 625 μL of hydrazine hydrate, and 3.875 mL of absolute ethanol to obtain a mixed solution.

[0051] Step 2: Add the solution mixed in step 1 into the liner of the polytetrafluoroethylene-lined hydrothermal reaction kettle, put it on the hydrothermal reaction kettle high-pressure tank, and put it in an oven at 180°C for 10 hours to react.

[0052] Step 3: After the reaction is completed, cool to room temperature, transfer the solution to a 50mL centrifuge tube, filter with a 0.22μM filter membrane, transfer the filtered solution to a 1000D dialysis bag, and transfer it to a tube filled with deionized water. Dialyze in a 2L beaker for 8 hours. After the dialysis, transfer the solution in the dialysis bag to a 50mL centrifuge tube, freeze it with liquid nitrogen, and then put it into a lyophilizer for freeze-...

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Abstract

The invention provides a preparation method of a cubic crystal phase structure carbon dot coated cerium dioxide material and application of the material in simultaneous adsorption and quantitative detection of fluorine ions. Natural polyphenol tannic acid is used as a raw material and is subjected to a simple hydrothermal reaction with a cerium source to prepare cubic crystal phase structure carbon dot coated cerium dioxide, and the material can efficiently adsorb fluorine ions. Furthermore, the inventor also finds that the superoxide dismutase activity of the carbon dot-coated cerium dioxide material is improved after the carbon dot-coated cerium dioxide material adsorbs the fluorine ions, so that the adsorption quantity of the fluorine ions can be detected while the carbon dot-coated cerium dioxide with the cubic crystal phase structure adsorbs the fluorine ions.

Description

[0001] The invention relates to the field of fluoride ion adsorption, in particular to a preparation method of a cubic crystal phase structure carbon dot-coated ceria material and its application in simultaneous adsorption and quantitative detection of fluoride ions. [0002] technical background [0003] With the rapid development of modern society, environmental pollution is becoming more and more serious, and excessive fluoride ion, as a common pollution of water pollution, has attracted more and more attention from the society. Fluoride ion (F - ) As a common element in nature, it plays a very important role in the life activities of animals and plants. However, excessive fluoride will inhibit the metabolism, respiration and photosynthesis of plants. At the same time, too much F - It will also affect human health, and our country due to F - The resulting environmental pollution is very serious. Therefore, it is urgent to develop an efficient and simple F - Cleanup and de...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28G01N21/33C02F101/14
CPCB01J20/06B01J20/20B01J20/28014C02F1/283G01N21/33C02F2101/14
Inventor 许子强孟菘李海敏杨清圆
Owner HUBEI UNIV
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